Hot-air furnace.



No. 796,735. PATENTED AUG, 8, 1905.

' F. KLEIN.

HOT AIR FURNACE.

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UNITED STATES PATENT OFF-ICE.

HOT-AIR FURNACE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed June 20, 1904. Serial No. 213,312.

To all whom it may concern.-

Be it known that I ,FRIEDERICH KLEIN, a citizen of the United States, residing at San Jose, in the county of Santa Clara and State of California, have invented a new and useful Hot- Air Furnace, of which the following is a specification.

My invention relates to improvements in hot-air furnaces in which the heat is obtained from a fire-cham ber and a series of radiatingpipes through which the smoke passes, both of which are inclosed in the same brick casing; and the objects of my improvement are to provide, first, a very simple, second, an economical, and, third, a durable appliance for heating dwelling places, churches, schools, halls, &c. I attain these objects by the construction illustrated in the accompanying drawings, in which Figure 1 is a detailed View in perspective of the furnace with the brick casing removed from the top and side, exposing the interior construction to view; Fig. 2, a perspective view of the furnace intact as it appears when ready for connection with the smoke and hotair pipes; Fig. 3, a rear view of the interior construction of the furnace after the brick casing has been removed from the top, sides, and back; and Fig. 4, a detailed view in perspective, showing the interior of the fire chamber.

Similar letters refer to similar parts throughout the several views.

The box G is the fire-chamber of the furnace. J and K are the separately-swinging doors to this chamber through which the furnace is fed. In the lower door K is the sliding damper which controls the draft.

The smoke and fire pass from the fire-chamber G into F, U, S, D, E, R, T, P, C, B, and Q, which constitute the radiating-pipes, thence into A, the first joint of the smoke-pipe, from which connection is made to the chimney. At both ends of each of the longer joints of radiating-pipe are removable covers L, after removing which the radiator may be thoroughly cleaned of soot through the openings, as at M, and better satisfaction may thus be obtained from the furnace.

The fire-chamber and radiating-pipes are inclosed in a brick casing which contains the hot air arising from the surface of the radiating-pipes and fire-chamber. This hot air is conducted to the various registers by hotair pipes connected to the brick casing at the openings 0. A pan H, containing water, is inserted in the side of the brickcasing to moistenthe heated air. The cover N prevents the escape of the heated air and steam from the casing. The cold-air supply is let into the brick casing by a pipe from the exterior of the building to the opening X in the casing.

To better protect the interior of the firechamber G, perforated cast-iron linings Z are put in over the sides, back, top, and bottom. These linings are in sections and being removable can readily be replaced.

The furnace is ordinarily made to burn wood; but by sliding in the raised grate Yit can also be operated with coal.

I am aware that prior to my invention hotair furnaces have been made in which the heat is led away from aradiating-surface. I therefore do not claim such a combination broadly; but

What I do claim as my invention, and desire to secure by Letters Patent, is

In a hot-air furnace, in combination with the casing of the furnace and the fire-box therein, of the horizontal pipe F leading from the fire-box through the rear wall of the casing, the vertical pipe U leading from the pipe F, the transverse pipe S, with which the pipe U connects, the longitudinal pipes D and E extending through both walls of the casing with which the pipe S connectsat one end the transverse pipe R connecting said pipes D and E near'their other ends, the vertical pipe T extending upward from the middle of the pipe R, the transverse pipe P with'which the pipe T connects, the longitudinal pipes B and 0 extending through the front and rear walls of the casing, with which the pipe P connects near one end, the transverse pipe Q connecting said pipes B and C near their other ends, the pipe A leading upward from FRIEDERICH KLEIN.

Witnesses:

A. SON'lI-IEIMER, W. M. SONTHEIMER. 

